Solder for aluminum



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SQLLUEH 32 0B; ALUll/flIhlUl /l;

whom it may concern 5 be known that 1, liter A. gl'aoonsun, a citizen oi the United States, residing at the city of fit. Louis, in the State of Missouri, have invented certain new and useful lm prov .ents in Solders for Aluminum, of which the following is a speclfication.

This invention consists in an improvement in'solders' for uniting altuninum, and can he used not only for uniting two parts,looth made of aluminum, but also two parts one oi:

which is aluminum and the other of some other material as,'for1nstance, brass or cop-- tempts have heretofore been made to produce a solder for joining aluminum parts, butthe results have not been satisfactory.

This present solder is compounded as fol lows, the ingredients being in substantially the proportions herein named: sixty seven and sixty hundredths (67.60) per cent. tin;

sixteen and ninety hundredths (16.90) per cent. zinc; two and eighty two hundredths (282) per cent. metallic bismuth; one and forty one hundredths (1A1) per cent. alumininn; and eleven and twenty seven hun- 4 dredths (11.2?) per cent. phosphorus tin.

T he phosphorus t'in is substantially five per cent. phosphorus and ninety-fiye per cent. tin.

Of course it is to be understood that the ordinary solder will not stick to aluminum, but after the above-described aluniinuin solder has been apyflied to aluminum, ordinary solder for tin'will stick to it.

In using prior solders for ahnninuro has been necessary to use the oXy-ae weldingproeess, but the solder of this i! tion .canheused with an ordinary soldering-iron, preferably heated hot as possi hle. and preferably to a StillStvd u hotter than when used tor soldering tin.

If desired, a blow-pipe or OXY-ilCElJYlGHl-B Welding apparatus may be used after the parts to be joined have been tinned as above described by the use of the iron.

The inetiod of melting this solder at the s eeification of Letters Eatent.

Patented use, iseo.

Application fine January aisle. Serial in. scenes.

in this solder the zinc is used for strength and the tin for greater iiusihility.

It is well known that lead will not unite with certain substances-as, for instance, aluminum, but it has been found in practice that this solder can lie-used to prepare the surface of aluminum for union with lead where that is desired, in which use ofthis solder the aluminum. is first tinned with this solder and thereupon ordinary sofusolder can he used to form a union with the said tinned part of the aluminum article, there being no antipathy oi the lead in the soft solder'to union with this solder.

While an accurate state'znentot ingredients for a combination that has been tried and found entirely satisfactory is hereinahove given for the purpose-of readily en-- abling others skilled in the'art to which this invention relates, to make and use the same and for that purpose is stated with considerable precision, yet it is amt intended by such minuteness of statement to. limit the v scope of this patent thereby, it being under 75 stood that only substantial compliance with the pri'lportions named is requisite.

The main ingredient of this composition of matter wherein the same differs from the prior art is phosphorus tin in a proportion of substantially ten per cent. of the Whole and in the composition of the whole tin s in quantity the main item.

One or more of the minor ingredients may be omitted without departing from the sp rit oi this invention, the of which is within it Y it. il'ilfi li dltll, 

